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Monodora Myristica) As a Flavourant in Cookie Production

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Monodora Myristica) As a Flavourant in Cookie Production International Journal of Food Studies IJFS October 2019 Volume 8 pages 1{12 Potentials of African Nutmeg (Monodora myristica) as a Flavourant in Cookie Production Kazeem K. Olatoyea*, Omololu O. Fapojuwoa, Joshu A. Olorunsholaa, and Julianah O. Ayorindea a Department of Food Science and Technology, College of Agriculture, Kwara State University, Malete, P.M.B 1530, Ilorin, Kwara State, Nigeria *Corresponding author [email protected] Received: 13 November 2017; Published online: 18 October 2019 Abstract African nutmeg, a possible local substitute for a commercial food flavourant, remains largely un- derutilized in Nigeria. Its application potential in cookie production was investigated in this study. African nutmeg (Monodora myristica) seed flour (ANM) was produced using a standard method. The flour was substituted for vanilla flavour (VFL) in ratio of 0, 1, 2, 3, and 3.5 g and functional proper- ties of the flour blends (water absorption capacity (WAC), oil absorption capacity (OAC), and bulk density) were determined, using standard methods. Cookies were developed and characterized chem- ically, physically (colour) and organoleptically using the AOAC method, a colourimeter and sensory panellists respectively. Data were analysed using ANOVA at p<0.05. Replacement of vanilla with African nutmeg had no significant effect on bulk density (0.62 g cm−3-0.68 g cm−3), but significantly affected WAC (133-142 %) and OAC (147-156 %) of flour blends. Crude protein (9.44-15.49 %), crude fat (3.17-6.50 %), total ash (2-2.73 %) and crude fibre (0.12-0.23 %) contents of the cookie increased, whilst metabolizable energy (385.33-367 kcal) decreased. There were reductions in pH (6.83-6.53) and TSS (5.80-1.20). Brown index of the snack increased with addition of nutmeg. Antioxidant indicators (flavonoids, DPPH and phenol) varied among cookie samples. Antinutrients, saponin, tannin and ox- alate, were within tolerable limits. All cookie samples were judged acceptable by the panellists, with SLZ being the most acceptable. An acceptable and nutritious snack was produced at 100 % replace- ment. M. myristica seed could serve as substitute for vanilla in the production of cookies and other related snacks. Keywords: Monodora myristica; Snack; Flavourant; Food additive; Substitution 1 Introduction driven lifestyles, job demands and dietary habits (Kruger, 2012; Olatoye & I. Lawal, 2016). Many people earn their livelihood through snack pro- Snacks are identified as foods eaten at times duction and marketing (Norfezah, 2013). Quite other than meals and could be mindfully or un- often, some snacks are perceived to be sugary and mindfully consumed. They include a variety of their excessive consumption has been attributed products and can take different forms, includ- to incidence of obesity, diabetes and coeliac dis- ing potato chips and cereal-based snacks (FAO, eases (Ajieroh, 2010). These might be connected 2011; Sajilata & S. Singhal, 2005; Sumargo, with the composition of their ingredients. 2016). Globally, the impact of snacks is felt daily Among other ingredients, flavourings remain mostly in big cities, possibly due to convenience Copyright ©2019 ISEKI-Food Association (IFA) 10.7455/ijfs/8.2.2019.a1 2 Olatoye et al. indispensable with application of commercial Ibadan, Nigeria. The wheat flour, sugar, salt, flavourings in snack production being common, egg, and vanilla were bought from modern mar- as this is meant to improve the taste and en- ket, Ilorin, Nigeria. The chemicals and reagents tice consumers. Ironically, some of these flavour- used were of analytical grade A and were ob- ings are synthetic and unhealthy. However, pro- tained from Bumlab Nigeria Limited, Ring Road, ducing healthy snacks from locally available ma- Ibadan, Nigeria. terials is the current trend and innovative de- velopment in the snack food industry. Conse- quently, it is necessary to explore natural flavour- 2.2 Production of African nutmeg ings and spices that may be considered as pos- powder sible alternatives to synthetic ones (Enwereuzoh et al., 2015). One example of such possible al- The seeds of M. myristica were shelled manually ternatives is M. myristica, commonly known as with the use of mortar and pestle and then milled African nutmeg. It is a perennial edible plant, into powder using an electric blender, sieved with belonging to the Ananacea family. It is a berry a 250 µm mesh and bottled in a sterile plastic with many seeds grown in the evergreen forests container prior to use. of West Africa (Burubai, Akor, Igoni, & Puyate, 2007), with almost every part of the tree possess- ing both economic and medicinal usefulness. Its 2.3 Cookie production pod is used as a seasoning spice in Southern and Eastern Nigeria (Aladesanmi, 2007; Essien, Izun- The method described by Eneche (1999) was wane, Aremu, & Eka, 1994). The seeds, which used to prepare cookies with slight modifications. are embedded in the white sweet-smelling pulp of A fluffy mixture of butter and sugar was obtained the fruit are considered most economically im- by manually mixing 125 g of baking butter with portant (Stephen, O., Oboh, & Eseosa, 2014). 120 g of sugar for 5 min. Another mixture of flour The seed powder is used as spices to prepare pep- (250 g), salt (2.5 g) and baking powder (10 g) per soup and also used as stimulant to relieve was prepared separately and combined with the constipation. Currently, the tendency to use the butter-sugar mixture to get a dough. A measured oil extracted from M. myristica and Tetrapleura amount of water (20 ml) was added gradually tetraptera to flavour popcorn has proven to jus- and the dough mixed continuously until a good tify the use of the spices as flavourings with good textured, firm dough was obtained. The dough acceptability and no adverse effect (Enwereuzoh was kneaded on a clean flat surface for 4 min et al., 2015). There have been few studies on the and transferred to a cutting table where a shape use of African nutmeg incorporated into snacks maker was pressed over the dough to give the de- as it is mostly used in seasoning soups and salads. sired shapes. Dough pieces were then transferred Largely, Nigerian food industries are still relying into liquid-fat-greased baking trays and baked at on the importation of flavourings at the expense 150 oC for 20 min, cooled and packaged for anal- of possible local substitutes (Enwereuzoh et al., ysis. 2015). Therefore, the objective of this research was to investigate the potential of African nut- meg as a flavouring agent in the production of 2.4 African nutmeg-vanilla flavour cookies. formulation for cookie African nutmeg (ANM) was substituted for 2 Materials and Methods vanilla flavour (VFL) in different proportions of 0, 1, 2, 3, and 3.5 g i.e. (0, 30, 60, 90 and 100 %) 2.1 Sources of Materials respectively, to give five (5) samples (Table1), according to the modified method described by The African nutmeg was obtained from Forestry Adeboye, Babajide, Shittu, Omemu, and Oluwa- Research Institute of Nigeria (FRIN), Jericho, tola (2013). IJFS October 2019 Volume 8 pages 1{12 African nutmeg and vanilla flavour blends 3 Table 1: Substitution of African nutmeg for vanilla flavour in cookie production Samples African nutmeg flour (g) Vanilla flavour (g) KMO 0.00 (0 %) 3.5 (100 %) JLK 1.00 (30 %) 2.50 (70 %) VRU 2.00 (60 %) 1.50 (40 %) PQS 3.00 (90 %) 0.50 (10 %) SLZ 3.50 (100 %) 0.00 (0 %) 2.5 Determination of functional joules per 100 g and the values were converted properties of flour blends to kcal by dividing them by the conversion fac- tor (4.184) (Maclean et al., 2003) as shown in Water absorption capacity (WAC) and oil ab- equation2. sorption capacity (OAC) were determined using Carb × 17 + Prot × 17 + Fat × 37 EV(kcal) = the method described by Sosulski (1962). For 4:184 the WAC, 1 g of the sample was added into 15 (2) ml of distilled water in a pre-weighed centrifuge Where EV = Energy value and Carb, Prot and tube, while for the OAC, oil with a known den- Fat are the composition in carbohydrates, pro- sity was added to the sample. The tube with its teins and fats contents was agitated for 2min and centrifuged at 4000 rpm for 20 min on a SorvallGLC-1 cen- 2.7 Determination of trifuge (Model 06470, USA). The clear super- natant was discarded and the centrifuge tube was physicochemical properties of weighed with the sediment. The amount of wa- cookie samples ter or oil bound by the sample was determined by difference and expressed as the weight of wa- A Fisher pH meter (Model 210, Fisher Scientific) ter bound by 100 g dry of flour. Bulk density was was used to determine the pH and an Abbe re- fractometer was used to determine the total sol- determined using the method of AOAC (2000). o The flour sample (7 g) was weighed into a 50 ml uble solids content (Brix) at 20 C. The physical graduated measuring cylinder. The cylinder was colour of the cookies was quantitatively deter- tapped gently against the palm of the hand until mined with the aid of a hand-held Colour Tec a constant volume was obtained, and the bulk PCM/PSMTM1 colour meter as described by density (BD) calculated as shown in equation1. Babajide and Odulate (2015) using a white tile as reference and recording the brightness (L*), weight of sample redness (a*) and yellowness (b*) values, Hunter BD = (1) volume of sample after tapping Lab values. 2.6 Determinations of proximate 2.8 Determination of Antioxidant composition and energy values profile of formulated cookie of cookie samples Phenol Proximate composition, including crude protein, Total phenol was determined by the Folin- fat, moisture content, crude fibre, ash and car- Ciocalteu spectrophotometric method (AOAC, bohydrate of the cookie samples were carried 1990).
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